-34.55% is the change from 819 to 536
Calculation steps:
[( 536 - 819 ) ÷ 819] x 100 = -34.55%
Formula
Percentage change = [(536 - 819) / 819] x 100
Subtract the new number by the original number
536 - 819 = -283
-283 ÷ 819 = -0.34554334554334554
-0.34554334554334554 x 100 = -34.55%